Need help with calculator program

This is a discussion on Need help with calculator program within the C# Programming forums, part of the General Programming Boards category; Hi, I have been trying to program a simple calculator all day but I just can't get it to work ...

  1. #1
    Registered User
    Join Date
    Jan 2004
    Posts
    13

    Need help with calculator program

    Hi, I have been trying to program a simple calculator all day but I just can't get it to work right. It works fine when using the one operator like + or - ect but when mixing them in a calculation like 2+2+2-1 it gives me the answer 1. I just don't get it. I've drawn diagrams of data flow and stuff but i'm stuck.
    I know its a big ask but if someone could paste this into vs .net and see where the problem is that would be great. I only wrote code for the numbers 1, 2 and 5. I just need to find a way to make the operators work.

    Code:
    using System;
    using System.Drawing;
    using System.Collections;
    using System.ComponentModel;
    using System.Windows.Forms;
    using System.Data;
    
    namespace Calculator
    {
    
    	public class Calculator : System.Windows.Forms.Form
    	{
    		//globals
    		decimal result1 = 0;
    		decimal result2 = 0;
    		decimal result3 = 0;
    		string op = "";
    		
    
    		private System.Windows.Forms.TextBox screen;
    		private System.Windows.Forms.Button button1;
    		private System.Windows.Forms.Button button2;
    		private System.Windows.Forms.Button butplus;
    		private System.Windows.Forms.Button butequals;
    		private System.Windows.Forms.Button butclear;
    		private System.Windows.Forms.Button button3;
    		private System.Windows.Forms.Button button4;
    		private System.Windows.Forms.Button button5;
    		private System.Windows.Forms.Button button6;
    		private System.Windows.Forms.Button button7;
    		private System.Windows.Forms.Button button8;
    		private System.Windows.Forms.Button button9;
    		private System.Windows.Forms.Button button0;
    		private System.Windows.Forms.Button butminus;
    		private System.Windows.Forms.Button butdivide;
    		private System.Windows.Forms.Button butmulti;
    		private System.Windows.Forms.Button butsigned;
    		private System.Windows.Forms.Button butdecimal;
    
    		private System.ComponentModel.Container components = null;
    
    		public Calculator()
    		{
    			InitializeComponent();
    		}
    
    		protected override void Dispose( bool disposing )
    		{
    			if( disposing )
    			{
    				if (components != null) 
    				{
    					components.Dispose();
    				}
    			}
    			base.Dispose( disposing );
    		}
    
    		#region Windows Form Designer generated code
    
    		private void InitializeComponent()
    		{
    			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Calculator));
    			this.screen = new System.Windows.Forms.TextBox();
    			this.button1 = new System.Windows.Forms.Button();
    			this.button2 = new System.Windows.Forms.Button();
    			this.butplus = new System.Windows.Forms.Button();
    			this.butequals = new System.Windows.Forms.Button();
    			this.butclear = new System.Windows.Forms.Button();
    			this.button3 = new System.Windows.Forms.Button();
    			this.button4 = new System.Windows.Forms.Button();
    			this.button5 = new System.Windows.Forms.Button();
    			this.button6 = new System.Windows.Forms.Button();
    			this.button7 = new System.Windows.Forms.Button();
    			this.button8 = new System.Windows.Forms.Button();
    			this.button9 = new System.Windows.Forms.Button();
    			this.button0 = new System.Windows.Forms.Button();
    			this.butminus = new System.Windows.Forms.Button();
    			this.butdivide = new System.Windows.Forms.Button();
    			this.butmulti = new System.Windows.Forms.Button();
    			this.butsigned = new System.Windows.Forms.Button();
    			this.butdecimal = new System.Windows.Forms.Button();
    			this.SuspendLayout();
    			// 
    			// screen
    			// 
    			this.screen.BackColor = System.Drawing.SystemColors.HighlightText;
    			this.screen.Font = new System.Drawing.Font("Microsoft Sans Serif", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.screen.Location = new System.Drawing.Point(24, 24);
    			this.screen.MaxLength = 30;
    			this.screen.Name = "screen";
    			this.screen.ReadOnly = true;
    			this.screen.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
    			this.screen.Size = new System.Drawing.Size(312, 29);
    			this.screen.TabIndex = 0;
    			this.screen.Text = "0";
    			// 
    			// button1
    			// 
    			this.button1.BackColor = System.Drawing.Color.Black;
    			this.button1.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button1.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button1.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button1.Location = new System.Drawing.Point(196, 92);
    			this.button1.Name = "button1";
    			this.button1.Size = new System.Drawing.Size(32, 32);
    			this.button1.TabIndex = 1;
    			this.button1.Text = "1";
    			this.button1.Click += new System.EventHandler(this.button1_Click);
    			// 
    			// button2
    			// 
    			this.button2.BackColor = System.Drawing.Color.Black;
    			this.button2.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button2.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button2.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button2.Location = new System.Drawing.Point(232, 92);
    			this.button2.Name = "button2";
    			this.button2.Size = new System.Drawing.Size(32, 32);
    			this.button2.TabIndex = 2;
    			this.button2.Text = "2";
    			this.button2.Click += new System.EventHandler(this.button2_Click);
    			// 
    			// butplus
    			// 
    			this.butplus.BackColor = System.Drawing.Color.Black;
    			this.butplus.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butplus.Font = new System.Drawing.Font("Comic Sans MS", 20.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butplus.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butplus.Location = new System.Drawing.Point(304, 92);
    			this.butplus.Name = "butplus";
    			this.butplus.Size = new System.Drawing.Size(32, 32);
    			this.butplus.TabIndex = 3;
    			this.butplus.Text = "+";
    			this.butplus.Click += new System.EventHandler(this.butplus_Click);
    			// 
    			// butequals
    			// 
    			this.butequals.BackColor = System.Drawing.Color.Black;
    			this.butequals.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butequals.Font = new System.Drawing.Font("Comic Sans MS", 20.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butequals.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butequals.Location = new System.Drawing.Point(160, 92);
    			this.butequals.Name = "butequals";
    			this.butequals.Size = new System.Drawing.Size(32, 32);
    			this.butequals.TabIndex = 4;
    			this.butequals.Text = "=";
    			this.butequals.Click += new System.EventHandler(this.butequals_Click);
    			// 
    			// butclear
    			// 
    			this.butclear.BackColor = System.Drawing.Color.Brown;
    			this.butclear.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butclear.Location = new System.Drawing.Point(48, 84);
    			this.butclear.Name = "butclear";
    			this.butclear.Size = new System.Drawing.Size(75, 28);
    			this.butclear.TabIndex = 5;
    			this.butclear.Text = "Clear";
    			this.butclear.Click += new System.EventHandler(this.butclear_Click);
    			// 
    			// button3
    			// 
    			this.button3.BackColor = System.Drawing.Color.Black;
    			this.button3.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button3.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button3.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button3.Location = new System.Drawing.Point(268, 92);
    			this.button3.Name = "button3";
    			this.button3.Size = new System.Drawing.Size(32, 32);
    			this.button3.TabIndex = 6;
    			this.button3.Text = "3";
    			this.button3.Click += new System.EventHandler(this.button3_Click);
    			// 
    			// button4
    			// 
    			this.button4.BackColor = System.Drawing.Color.Black;
    			this.button4.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button4.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button4.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button4.Location = new System.Drawing.Point(196, 128);
    			this.button4.Name = "button4";
    			this.button4.Size = new System.Drawing.Size(32, 32);
    			this.button4.TabIndex = 7;
    			this.button4.Text = "4";
    			this.button4.Click += new System.EventHandler(this.button4_Click);
    			// 
    			// button5
    			// 
    			this.button5.BackColor = System.Drawing.Color.Black;
    			this.button5.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button5.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button5.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button5.Location = new System.Drawing.Point(232, 128);
    			this.button5.Name = "button5";
    			this.button5.Size = new System.Drawing.Size(32, 32);
    			this.button5.TabIndex = 8;
    			this.button5.Text = "5";
    			this.button5.Click += new System.EventHandler(this.button5_Click);
    			// 
    			// button6
    			// 
    			this.button6.BackColor = System.Drawing.Color.Black;
    			this.button6.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button6.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button6.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button6.Location = new System.Drawing.Point(268, 128);
    			this.button6.Name = "button6";
    			this.button6.Size = new System.Drawing.Size(32, 32);
    			this.button6.TabIndex = 9;
    			this.button6.Text = "6";
    			this.button6.Click += new System.EventHandler(this.button6_Click);
    			// 
    			// button7
    			// 
    			this.button7.BackColor = System.Drawing.Color.Black;
    			this.button7.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button7.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button7.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button7.Location = new System.Drawing.Point(196, 164);
    			this.button7.Name = "button7";
    			this.button7.Size = new System.Drawing.Size(32, 32);
    			this.button7.TabIndex = 10;
    			this.button7.Text = "7";
    			this.button7.Click += new System.EventHandler(this.button7_Click);
    			// 
    			// button8
    			// 
    			this.button8.BackColor = System.Drawing.Color.Black;
    			this.button8.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button8.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button8.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button8.Location = new System.Drawing.Point(232, 164);
    			this.button8.Name = "button8";
    			this.button8.Size = new System.Drawing.Size(32, 32);
    			this.button8.TabIndex = 11;
    			this.button8.Text = "8";
    			this.button8.Click += new System.EventHandler(this.button8_Click);
    			// 
    			// button9
    			// 
    			this.button9.BackColor = System.Drawing.Color.Black;
    			this.button9.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button9.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button9.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button9.Location = new System.Drawing.Point(268, 164);
    			this.button9.Name = "button9";
    			this.button9.Size = new System.Drawing.Size(32, 32);
    			this.button9.TabIndex = 12;
    			this.button9.Text = "9";
    			this.button9.Click += new System.EventHandler(this.button9_Click);
    			// 
    			// button0
    			// 
    			this.button0.BackColor = System.Drawing.Color.Black;
    			this.button0.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.button0.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.button0.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.button0.Location = new System.Drawing.Point(196, 200);
    			this.button0.Name = "button0";
    			this.button0.Size = new System.Drawing.Size(32, 32);
    			this.button0.TabIndex = 13;
    			this.button0.Text = "0";
    			this.button0.Click += new System.EventHandler(this.button0_Click);
    			// 
    			// butminus
    			// 
    			this.butminus.BackColor = System.Drawing.Color.Black;
    			this.butminus.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butminus.Font = new System.Drawing.Font("Comic Sans MS", 20.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butminus.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butminus.Location = new System.Drawing.Point(304, 128);
    			this.butminus.Name = "butminus";
    			this.butminus.Size = new System.Drawing.Size(32, 32);
    			this.butminus.TabIndex = 14;
    			this.butminus.Text = "-";
    			this.butminus.Click += new System.EventHandler(this.butminus_Click);
    			// 
    			// butdivide
    			// 
    			this.butdivide.BackColor = System.Drawing.Color.Black;
    			this.butdivide.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butdivide.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butdivide.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butdivide.Location = new System.Drawing.Point(304, 164);
    			this.butdivide.Name = "butdivide";
    			this.butdivide.Size = new System.Drawing.Size(32, 32);
    			this.butdivide.TabIndex = 15;
    			this.butdivide.Text = "/";
    			this.butdivide.Click += new System.EventHandler(this.butdivide_Click);
    			// 
    			// butmulti
    			// 
    			this.butmulti.BackColor = System.Drawing.Color.Black;
    			this.butmulti.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butmulti.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butmulti.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butmulti.Location = new System.Drawing.Point(304, 200);
    			this.butmulti.Name = "butmulti";
    			this.butmulti.Size = new System.Drawing.Size(32, 32);
    			this.butmulti.TabIndex = 16;
    			this.butmulti.Text = "x";
    			this.butmulti.Click += new System.EventHandler(this.butmulti_Click);
    			// 
    			// butsigned
    			// 
    			this.butsigned.BackColor = System.Drawing.Color.Black;
    			this.butsigned.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butsigned.Font = new System.Drawing.Font("Comic Sans MS", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butsigned.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butsigned.Location = new System.Drawing.Point(268, 200);
    			this.butsigned.Name = "butsigned";
    			this.butsigned.Size = new System.Drawing.Size(32, 32);
    			this.butsigned.TabIndex = 17;
    			this.butsigned.Text = "+/-";
    			this.butsigned.Click += new System.EventHandler(this.butsigned_Click);
    			// 
    			// butdecimal
    			// 
    			this.butdecimal.BackColor = System.Drawing.Color.Black;
    			this.butdecimal.Cursor = System.Windows.Forms.Cursors.Hand;
    			this.butdecimal.Font = new System.Drawing.Font("Comic Sans MS", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
    			this.butdecimal.ForeColor = System.Drawing.SystemColors.ActiveCaptionText;
    			this.butdecimal.Location = new System.Drawing.Point(232, 200);
    			this.butdecimal.Name = "butdecimal";
    			this.butdecimal.Size = new System.Drawing.Size(32, 32);
    			this.butdecimal.TabIndex = 18;
    			this.butdecimal.Text = ".";
    			this.butdecimal.Click += new System.EventHandler(this.butdecimal_Click);
    			// 
    			// Calculator
    			// 
    			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    			this.BackColor = System.Drawing.Color.Silver;
    			this.ClientSize = new System.Drawing.Size(360, 406);
    			this.Controls.Add(this.butdecimal);
    			this.Controls.Add(this.butsigned);
    			this.Controls.Add(this.butmulti);
    			this.Controls.Add(this.butdivide);
    			this.Controls.Add(this.butminus);
    			this.Controls.Add(this.button0);
    			this.Controls.Add(this.button9);
    			this.Controls.Add(this.button8);
    			this.Controls.Add(this.button7);
    			this.Controls.Add(this.button6);
    			this.Controls.Add(this.button5);
    			this.Controls.Add(this.button4);
    			this.Controls.Add(this.button3);
    			this.Controls.Add(this.butclear);
    			this.Controls.Add(this.butequals);
    			this.Controls.Add(this.butplus);
    			this.Controls.Add(this.button2);
    			this.Controls.Add(this.button1);
    			this.Controls.Add(this.screen);
    			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
    			this.Name = "Calculator";
    			this.Text = "The Bruce Calculator";
    			this.ResumeLayout(false);
    
    		}
    		#endregion
    
    
    		[STAThread]
    		static void Main() 
    		{
    			Application.Run(new Calculator());
    		}
    
    		private void button1_Click(object sender, System.EventArgs e)
    		{
    			if(screen.Text == "0")
    			{
    				this.screen.Text = "1";
    			}
    			else
    			{
    				screen.AppendText("1");
    			}
    
    
    			}
    
    		private void button2_Click(object sender, System.EventArgs e)
    		{
    			if(screen.Text == "0")
    			{
    				this.screen.Text = "2";
    			}
    			else
    			{
    				screen.AppendText("2");
    			}
    		}
    
    
    
    		private void button3_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button4_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button5_Click(object sender, System.EventArgs e)
    		{
    			if(screen.Text == "0")
    			{
    				this.screen.Text = "5";
    			}
    			else
    			{
    				screen.AppendText("5");
    			}
    		}
    
    		private void button6_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button7_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button8_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button9_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void button0_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void butclear_Click(object sender, System.EventArgs e)
    		{
    			screen.Text = "0";
    			result1 = 0;
    			result2 = 0;
    			result3 = 0;
    		}
    
    		private void butplus_Click(object sender, System.EventArgs e)
    		{	
    			op = "+";
    			if(result1 == 0)
    			{
    				result1 = decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    			else
    			{
    				result1 = result1 + decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    			
    
    		}
    
    		private void butequals_Click(object sender, System.EventArgs e)
    		{
    			result2 = decimal.Parse(screen.Text);
    			switch(op)
    			{
    				case "+":
    					arithmetic temp = new arithmetic();
    					result3 = temp.add(result1, result2);
    					result1 = result3;
    					screen.Text = result1.ToString();
    					result3 = 0;
    					
    					break;
    
    				case "-":
    					arithmetic temp1 = new arithmetic();
    					result3 = temp1.minus(result1, result2);
    					result1 = result3;
    					screen.Text = result1.ToString();
    					result3 = 0;
    					break;
    
    				case "/":
    					arithmetic temp2 = new arithmetic();
    					result3 = temp2.divide(result1, result2);
    					result1 = result3;
    					screen.Text = result1.ToString();
    					result3 = 0;
    					break;
    
    				case "*":
    					arithmetic temp3 = new arithmetic();
    					result3 = temp3.multi(result1, result2);
    					result1 = result3;
    					screen.Text = result1.ToString();
    					result3 = 0;
    					break;
    			}
    			
    		}
    
    		private void butminus_Click(object sender, System.EventArgs e)
    		{
    			op = "-";
    			if(result1 == 0)
    			{
    				result1 = decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    			else
    			{
    				result1 = result1 - decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    		}
    
    		private void butdivide_Click(object sender, System.EventArgs e)
    		{
    			op = "/";
    			if(result1 == 0)
    			{
    				result1 = decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    			else
    			{
    				result1 = result1 / decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    		}
    
    		private void butmulti_Click(object sender, System.EventArgs e)
    		{
    			op = "*";
    			if(result1 == 0)
    			{
    				result1 = decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    			else
    			{
    				result1 = result1 * decimal.Parse(screen.Text);
    				screen.Text = "";
    			}
    		}
    
    		private void butdecimal_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    		private void butsigned_Click(object sender, System.EventArgs e)
    		{
    		
    		}
    
    
    	}
    }
    
    
    ///////////////class in another file
    
    using System;
    
    namespace Calculator
    {
    	
    	public class arithmetic
    	{
    		public arithmetic()
    		{
    			//
    			// TODO: Add constructor logic here
    			//
    		}
    
    		public decimal add(decimal a, decimal b)
    		{
    			return a + b;
    		}
    
    		public decimal minus(decimal a, decimal b)
    		{
    			return a - b;
    		}
    
    		public decimal divide(decimal a, decimal b)
    		{
    			return a / b;
    		}
    
    		public decimal multi(decimal a, decimal b)
    		{
    			return a * b;
    		}
    
    
    	}
    }
    Thanks heaps for any help with this,
    Kate

  2. #2
    Registered User
    Join Date
    Nov 2002
    Posts
    10
    I think your problem lies in your butequals_Click(), when you switch on 'op' it will only switch on the last value assigned to 'op'.

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